Boiler-furnace



(No Model.)

E. A. WHEELER. BOILER FURNACE.

No. 471,449. Patent ed'Mar. 22, 1892.

a f 20237 Ez'ra? 2 2235 1" UNITED STATES PATENT OFFICE.

EARL A. WHEELER, OF SHARON, PENNSYLVANIA.

BOILER-FURNACE.

SPECIFICATION forming part of Letters Patent No. 471,449, dated March22, 1892.

Application filed November 4, 1891. Serial No. 410,840. (No model.)

To all whom it may concern.-

Be it known that I, EARL A. WHEELER, a citizen of the United States ofAmerica, residing at Sharon, in the county of Mercer and State ofPennsylvania, have invented certain new and useful Improvements inBoiler-Furnaces, of which the following is a specification.

My invention is an improvement in boilerfurnaces, andis shownparticularly as applied to the boiler-furnace illustrated in anapplication filed by me on the 7th day of March, 1891, Serial No.384,088. I do not, however, limit myself to the application ofthepresent invention to my particular form of boilerfurnace,.as it may beapplied with equally good effects to other forms of furnaces where thereare a double set of boilers connected by intermediate pipes.

In the accompanying drawing the boilers and the furnace illustrated areprecisely similar to what is shown in my pending application, the viewbeing an end elevation with a part of the brick-work in section.

The furnace is shown at A, and two boilers of the lower set at B. Theupper boilers are not shown, but a portion of the connectingpipes areshown at 0.

My principal object is to utilize to the greatest possible extent theheat generated by the furnace, and in carrying out this object I aim toretard the escape of the heat by absorbing it, between the furnace andplace of exit, in material which is in close proximity to the stacks ofconnecting-pipes between the boilers.

In adapting this invention to myimproved form of furnace, I bridge overthe upper part of the furnace-opening by means of arched bricks of asuitable size, as shown at a. These bricks are preferably laid aboutfour inches apart throughout the length of the boilers, and these serveto support a series of firebrick of ordinary size, as at d, placed atright angles to the direction of the length of the large brick. A spaceis left between these bricks, as shown, and upon these are placedanother series of bricks, as at c, reversed in position, thus forming achecker-work construction providing openings for the passage of theproducts of combustion or for draft, but i-nterposing a mass whichabsorbs all'the heat from the furnace, and, as this material surroundsthe connecting-stacks of pipes, it will be seen that the heat isthoroughly utilized at the most available point. These brick may bebuilt up to the top of the stacks of pipes, if desired, or may stop atany intermediate point, as may be found desirable.

In the use of this invention with furnaces where there is perfectcombustion the openings through the brick may be closed at the top, soas to retain all the heat; but where natural draft is required or it isdesired to allow the escape of the products of combustion they may beleft open and in connection with the flue.

Iv claim as my invention- 1. In combination with a series of boilers andinterposed stacks of connecting-pipes, a furnace and an interposedabsorbent material surrounding the stacks to retard the escape of theheat between the furnace and the place of exit, said materialsurrounding the stacks of pipes, substantially as described.

2. In combination with a set of boilers, with a series ofconnecting-pipes between, and with a furnace for heating said boilers,said boilers resting upon arches, fire-brick spanning the spaces at thetop of the arches, with spaces between, and a series of fire-brickplaced in tiers at right angles to each other upon the arched brick,said brick encircling the pipes and interposed between the furnace andthe exit, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

EARL A. WHEELER.

Witnesses:

G. W. SHILLING, A. W. WILLIAMs.

